Al-1.1Mn-0.3Mg-0.25RE合金的热变形行为及其加工图
Hot Deformation Behavior and Processing Map of Al-1.1Mn-0.3Mg-0.25RE Alloy
摘 要
在Gleeb-1500型热模拟试验机上对Al-1.1Mn-0.3Mg-0.25RE合金进行了热压缩试验, 研究了变形温度为300～500 ℃、应变速率为0.01～10 s-1条件下合金的热变形行为, 并在此基础上建立了本构方程, 绘制了合金加工图。结果表明: 合金热变形过程中的稳态流变应力可以用双曲正弦本构关系描述, 热变形激活能为186.481 7 kJ·mol-1, 材料常数A、α、n分别为1.076 97×1010 s-1, 0.037 403, 5.875 667;合金最佳的加工温度为450 ℃, 应变速率为0.01 s-1。
流变应力
热变形激活能
加工图
aluminium alloy containing RE
flow stress
thermo deformation activation energy
processing map
Abstract
The hot compression experiment of Al-1.1Mn-0.3Mg-0.25RE alloy was done on Gleeble 1500 thermo simulation test machine. The thermo deformation behavior was studied at 300-500 ℃ and the strain rate of 0.01-10 s-1. On this basis the constitutive equations and the processing map were obtained. The results show that the steady flow stress could be described by the hyperbolic sine constitutive relation, the hot deformation activation energy was 186.481 7 kJ ·mol-1, and the material constants of A, α and n were 1.076 97×1010 s-1, 0.037 403 and 5.875 667 respectively. The optimum deformation temperature of the alloy was 450 ℃ and the optimum strain rate was 0.01 s-1.
中图分类号 TG146.21
所属栏目
基金项目 汽车轻量化技术国际合作研究项目(2010DFB70180)
收稿日期 2010/6/3
修改稿日期 2011/2/18
网络出版日期
作者单位点击查看
备注孟显娜(1986-), 女, 内蒙古赤峰人, 硕士研究生。
引用该论文: MENG Xian-na,ZHONG Hua-ping,ZHANG Hui,LI Luo-xing. Hot Deformation Behavior and Processing Map of Al-1.1Mn-0.3Mg-0.25RE Alloy[J]. Materials for mechancial engineering, 2011, 35(7): 17～21
孟显娜,钟华萍,张辉,李落星. Al-1.1Mn-0.3Mg-0.25RE合金的热变形行为及其加工图[J]. 机械工程材料, 2011, 35(7): 17～21
被引情况:
【1】吴圆丽,程超增, "高效综合熔体处理3003铝合金的热变形加工图",机械工程材料 38, 97-100(2014)
【2】吉先武,邓承佯,熊懿,吴根林,张伟, "飞机铸造镁合金件螺栓孔的开裂原因",腐蚀与防护 37, 171-174(2016)
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参考文献
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【2】DAVIES G. Materials for automobile bodies[M].Oxford: Butterworth-Heinemann, 2003.
【3】Reynold metals company. Corrosion resistant aluminumalloy. United States: WO97/46726[P].1997-11-12.
【4】陈永禄, 傅高升, 陈文哲.微量稀土对Al-1Mn-1Mg合金中杂质相的变质作用探讨[J].中国稀土学报, 2005(增刊): 99-103.
【5】邢泽炳, 聂祚仁, 邹景霞.微量的稀土元素Er对Al-Mn合金组织与性能的影响[J].铸造, 2007, 56(11): 1207-1210.
【6】PRASAD Y V R K, GEGEL H L, DORAIVELU S M, et al. Modeling of dynamic material behavior in hot deformation: forging of Ti-6242[J].Metallurgical and Materials Transactions A, 1984, 15(10): 1883-1892.
【7】PRASAD Y V R K, SASIDHARA S. Hot working guide: a compendium of processing maps[M].Materials Park: ASM International, 1997: 214.
【8】黄光胜, 汪凌云, 陈华, 等.2618铝合金的热变形和加工图[J].中国有色金属学报, 2005, 15(5): 763-767.
【9】汪凌云, 范永革, 黄光胜, 等.镁合金AZ31B高温塑性变形及加工图理论[J].中国有色金属学报, 2004, 14(7): 1068-1072.
【10】ONAS J, SELLARS C M, TEGART W J, et al. Strength and structure under hot working condition[J].International Metal Reviews, 1969, 14: 1-24.
【11】SHI H, MCLAREN A J, SELLARS C M, et al. Constitutive equations for high temperature flow stress of aluminum alloys[J].Materials Science and Technology, 1997, 13: 210-216.
【12】ZENER C, HOLLOMON J H. Effect of strain-rate upon the plastic flow of steel[J].J Appl Phys, 1944, 15(1): 22-27.
【13】吴文祥, 孙德勤, 张辉, 等.3003铝合金热变形流变应力特征[J].热加工工艺, 2007, 36(6): 12-17.
【14】BOZZINI B, CERRI E. Numerical reliability of hot working processing maps[J].Materials Science and Engineering A, 2002, 328(12): 344-347.
【15】MCQUEEN H J, RYAN N D, KONOPLEVA E V, et al. Formation and application of grain boundary serration[J].Canadian Metallurgical Quarterly, 1995, 4(3): 219-229.
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